JP2000196752A - Extension telephone incoming call correction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely dissolve confusion of an erroneous incoming call, which occurs at the time of call-back from an opposite telephone set to a caller, by displaying not a dial-in extension number but the selected telephone number of a trunk line on a call number display unit which the opposite telephone set has when the extension telephone set makes a call. SOLUTION: A dial-in private exchange PBX receive the dial number of an extension telephone set Ex1 and transmits it to a call information recording transmitter DCI. The call information recording transmitter DCI specifies the extension telephone set Ex1 from the dial number obtained from the dial-in private exchange PBX and the number detector IDS, judges that the transferred extension number is a dial-in extension and transmits the dial-in extension number given to the extension telephone set Ex1 to a public electric communication network PSTN as a call telephone number. A call number display unit DP in an opposite telephone line displays the dial-in extension number given to the extension telephone set, Ex1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a false call originating from a combination of a conventional caller information notification service in a public switched telephone network (PSTN) and a conventionally used dial-in private branch exchange (PBX). And a technique for correcting the

[0002]

2. Description of the Related Art FIG. 2 shows a plurality of extension telephones (Ex
, Ex2,... Exn), and a remote telephone (TL) having a calling number display (DP) connected to a public telecommunications network (PSTN). It is a figure showing an electric communication system.

[0003] Calling number display (DP) of the other party's telephone line
Displays the telephone number of the calling subscriber telephone line by the caller information notification service. This allows the other party to specify the caller.

[0004]

There are the following disadvantages. A plurality of extension telephones (Ex1, Ex2, ...)
If Exn is connected to the public switched telephone network (PSTN) via a dial-in private branch exchange (PBX), the extension telephone number of a certain extension telephone (Ex1) is displayed as the calling number of the other party's telephone line. Display is not always accurate on the display (DP). That is, a communication line (hereinafter, referred to as an office line) between the dial-in private branch exchange (PBX) and the public telecommunications network (PSTN) is usually provided with a plurality of lines, and communication from a previously used extension telephone is already one. Or, when a plurality of office lines are used, the dial-in private branch exchange (PBX) selects another unused office line and connects it to the public telephone network (PSTN). The telephone number assigned to the selected office line is displayed on the number display (DP).

If the other party calls back to this office line, the telephone number of the displayed office line arrives at the extension telephone assigned as the dial-in extension number, and the extension telephone which should be called back (Ex1) does not receive a call. If the line is a call-only line, the telephone number is called back to the public telephone network (P
STN) is a telephone number that does not exist and is not connected. In either case, the call cannot be received at the target extension telephone (Ex1). That is, it is an erroneous call, and both sides of the call cause unknown confusion. The present invention has been made to eliminate such erroneous incoming calls.

[0006]

(1) The apparatus according to the present invention comprises:
As shown in FIG. 1, a plurality of extension telephones (Ex1, Ex1,
2, Exn) and dial-in private branch exchange (PB)
X), a public telecommunications network (PSTN), a calling number display (DP), and a destination telephone (TL) in a telecommunications system, including a dial-in private branch exchange (PBX) and extension telephones (Ex1, Ex2, .. Exn) and a call information recording and transmitting device (DCI) between the dial-in private branch exchange (PBX) and the public telecommunications network (PSTN). Container (ID
S) and a call information recording and transmitting device (DCI).
(RF). Call Information Record Transmitter (DCI)
And a public telecommunications network (PSTN) are connected by an ISDN line.

According to the above configuration, the number detector (IDS)
Detects the dial numbers of the extension telephones (Ex1, Ex2,... Exn), that is, the other party's telephone numbers, and transfers them to the call information recording and transmitting device (DCI) together with the extension numbers. Also, the dial-in private branch exchange (PBX) receives the dial number of the extension telephone from which the call was made and sends it to a call information recording and transmitting device (DC).
I).

(2) The call information recording and transmitting device (DCI) includes a dial-in private branch exchange (PBX) and a number detector (IDS).
Identify the extension phone that originated from the dial number obtained from, and if the extension is determined to be a dial-in extension, add a dial-in extension number that is self-maintained and recorded in advance corresponding to the extension number as calling number information, It can be sent to the public telecommunications network (PSTN) via the ISDN line, and its dial-in extension can be displayed on the calling number display (DP) of the other party's telephone line.

Later, when the other party's telephone (TL) calls back to this dial-in extension number displayed on the calling number display (DP), the information recording / transmitting unit (DCI) causes the public telephone communication network (PSTN) to return. ) Is converted to a dial-in signal by the ISDN line and sent to the dial-in private branch exchange (PBX), so that the dial-in private branch exchange (PBX) can use the extension telephone (Ex1,
Ex2,... Exn), the extension telephone incoming call correcting device according to the above-mentioned (1), which is capable of specifying the extension telephone connected to this dial-in extension number to make a dial-in incoming call.

(3) Further, an information recording and transmitting device (DCI)
Determines that the extension is not a dial-in extension, the extension number and the extension telephone (Ex1, Ex2,...)
Exn) dial number, that is, the other party's telephone number, is recorded in association with it, and a specific dial-in extension number is sent as a calling telephone number to the public telecommunication network (PSTN) via the ISDN line, and the other party's telephone line is sent. The number display (DP) displays the particular dial-in extension.

Later in the above, when the other party telephone (TL) calls back the telephone number displayed on the calling number display (DL), the call information recording and transmitting device (DCI) is switched to the public telecommunication network (PSTN). The dial-in private branch exchange (PB) is used as an extension telephone to which the extension telephone to which the extension number corresponding to the extension number corresponding to the other party telephone number is connected from the record is known by the caller information notification service provided by
The above (1) that can be dialed in to X)
Is an extension telephone incoming call correction device.

(4) The call information recording and transmitting device (DCI) is fixed in advance as a means for recording the extension number and the dial number of the extension telephone (Ex1, Ex2,... There is a method of additionally recording and a method of additionally recording the other party's telephone number every time a call is made from an extension telephone (Ex1, Ex2,... Exn). The additional telephone number of the other party to be recorded is the extension telephone incoming call correction device of (3) according to the configuration of (1) above, which can be valid for a fixed set time or a fixed set number of incoming calls.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An extension telephone incoming call correction device according to the present invention, as shown in FIG.
X) is provided with a number detector (IDS) on the extension telephone (Ex1, Ex2,... Exn) side, and the number detector (IDS)
Detects the dial number transmitted by the extension telephones (Ex1, Ex2,... Exn), that is, the other party's telephone number, and transfers it to the call information recording and transmitting device (DCI) together with the extension number.
The dial-in private branch exchange (PBX) receives the dial number of the extension telephone from which the call originated, and sends the dial number to the call information record transmitter (DCI).

At this time, if the extension number detected by the number detector (IDS) is a dial-in extension, the call information record transmitter (DCI) transmits the dial number obtained from the dial-in private branch exchange (PBX) and the number detector (IDS). , The extension telephone that has transmitted the call is specified, and the dial-in extension number corresponding to the transferred extension number is transmitted to the public telecommunication network (PSTN) as the call telephone number from the information stored and stored in advance. As a result, the dial-in extension number is displayed on the calling number display (DP) of the other party's telephone line. Calling number display (DP) from the other party's telephone (TL)
Is called back, the call information record transmitter (DCI) transmits the dial-in extension obtained from the public switched telephone network (PSTN) via the ISDN line to the dial-in private branch exchange (PBX). As a result, the dial-in private branch exchange (PBX) can
1, Ex2,... Exn), the displayed number is specified to the extension telephone connected to the extension assigned as the dial-in extension number, and the incoming call is received. As a result, it is possible to specify the extension telephone as the destination of the other party who made the call and receive the call correctly.

If the extension number detected by the number detector (IDS) is not a dial-in extension, the call information recording and transmitting device (DCI) transmits the dial information obtained from the dial-in private branch exchange (PBX) and the number detector (IDS). From the number, the extension telephone that made the call is specified, and the extension number and the dial number, that is, the other party's telephone number are recorded in association with each other. Transmit to the communication network (PSTN). As a result, the specific dial-in extension transmitted to the public telecommunication network (PSTN) is displayed on the calling number display (DP) of the other party's telephone (TL). Calling number display (DP) from the other party's telephone (TL)
When the call is returned to the telephone number indicated in the above, the call information recording and sending device (DCI) knows the other party's telephone number by the caller information notification service provided by the public telephone network (PSTN), and reads the other party's telephone number from the record. The extension telephone to which the extension number corresponding to is connected is dialed in by a dial-in private branch exchange (PBX) as an extension telephone to be connected. As a result, the other party who made the call can specify the extension telephone at which the call was made and receive the call correctly.

[0016]

Embodiment 1 FIG. 1 shows an embodiment of an extension telephone receiving apparatus according to the present invention, and details thereof will be described below. FIG. 1 shows a plurality of extension telephones (Ex1, Ex2,... Exn).
, A dial-in private branch exchange (PBX), a public telecommunications network (PSTN), a calling number display (DP), and a remote telephone (TL). Extension phone (Ex
1, Ex2,... Exn)
S) and a call information recording and transmitting device (D) between the dial-in private branch exchange (PBX) and the public telecommunications network (PSTN).
CI) and a transfer line (TRF) is connected between the number detector (IDS) and the call information recording and sending device (DCI) to connect the call information recording and sending device (DCI) to the public telecommunication network (PSTN). 1) shows an embodiment in which the connection between the parentheses is connected by an ISDN line.

According to the configuration shown in FIG. 1, for example, when the extension telephone (Ex1) is an extension telephone connected to the dial-in extension and the caller A calls the other telephone (TL) from the extension telephone (Ex1), The paging signal is transmitted from a number detector (IDS), a dial-in private branch exchange (PBX), a call information recording and sending device (DCI), and a public telecommunication network (PST).
N), via the calling number display (DP), the other party's telephone (T
L). At this time, the number detector (IDS) transfers the extension number and the dial number of the extension telephone (Ex1) to the call information recording and transmitting device (DCI) through the transfer circuit (TRF). Further, the dial-in private branch exchange (PBX) receives the dial number of the extension telephone (Ex1) and sends it to the call information recording and sending unit (DCI). Call information record transmitter (D
CI) uses the dialed numbers obtained from the dial-in private branch exchange (PBX) and the number detector (IDS) to obtain the extension telephone (E).
x1) is specified, and from the information stored and held in advance,
It is determined that the transferred extension number is a dial-in extension, and the dial-in extension number corresponding to this extension number, that is, the dial-in extension number assigned to the extension telephone (Ex1) is used as the originating telephone number in the public telecommunication network. (PST
N). A calling number display (DP) on the other party's telephone line displays a dial-in extension number assigned to the extension telephone (Ex1).

When the other party B calls back the caller A later, the other party's telephone (TL) generally returns to the telephone number displayed on the calling number display (DP). The call back signal at this time arrives at the extension telephone (Ex1) of the caller A via the public telecommunication network (PSTN), which is transmitted by the call information recording and transmitting device (DCI) to the public telecommunication network (PSI).
TN) is relayed to a dial-in private branch exchange (PBX) to receive a call to the extension telephone (Ex1) originated by the caller A.

If the above process is itemized for easy understanding,
(1) Telephone connected to dial-in extension (Ex1)
Dial the number of the other party's telephone (TL) from. (2)
The number detector (IDS) transfers the extension number of the extension telephone (Ex1) and the dial number of the extension telephone (Ex1), that is, the other party's telephone number, to the call information recording transmitter (DCI) through the transfer circuit (TRF). (3) The dial-in private branch exchange (PBX) receives the dial number of the extension telephone (Ex1) and sends it to the call information recording and sending unit (DCI).
(4) The call information recording and transmitting device (DCI) specifies the extension telephone (Ex1) from the dial number obtained from the dial-in private branch exchange (PBX) and the number detector (IDS), and the extension from the information stored and held in advance. It is determined that the extension to which the telephone (Ex1) is connected is a dial-in extension, and a dial-in extension corresponding to the extension telephone (Ex1);
That is, the dial-in extension number assigned to the extension telephone (Ex1) is transmitted to the public telecommunication network (PSTN).
(5) A dial-in extension number assigned to this extension telephone (Ex1) is displayed on a calling number display (DP) on the other party's telephone line. (6) Later, when the other party's telephone (TL) calls back to the number displayed on the calling number display (DP), (7) the call information recording and sending unit (DCI) dials in from the public telephone network (PSTN). Send the extension number to the dial-in private branch exchange (PBX).
(8) The dial-in private branch exchange (PBX) causes the extension telephone (Ex1) to dial back the call from the other party.

[0020]

Second Embodiment In the configuration of FIG. 1, for example, the extension telephone (Ex2) is an extension telephone connected to an extension other than dial-in, and the caller C calls the other telephone (TL) from the extension telephone (Ex2). In such a case, the calling signal is transmitted from a number detector (IDS),
BX), a call information recording / sending device (DCI), a public telecommunications network (PSTN), and a calling number display (DP). At this time, the call information record transmitter (DCI) specifies the extension telephone (Ex2) from the dial number obtained from the dial-in private branch exchange (PBX) and the number detector (IDS), It is determined that the transferred extension number is not a dial-in extension, and the extension number and the dial number of the extension telephone (Ex2), that is, the other party's telephone number are recorded in association with each other, and the specific dial-in extension number is set to the public telephone number. Transmit to the communication network (PSTN). The calling number indicator (DP) of the other party's telephone line displays the specific dial-in extension number sent.

Later in the above, when the other party D calls back the caller C, the other party telephone (TL) sends a calling number display (DP).
It is common practice to call back to the telephone number indicated in. The return signal at this time is a public telecommunications network (PST).
N), the call information recording and sending device (DCI) converts the number and arrives at the extension telephone (Ex2) of the caller C. This is performed by the call information recording and sending device (DCI) by the public telecommunication network (PSTN). ), The extension number corresponding to the other party's telephone number obtained by the caller information notification service provided from the record is obtained, and the extension number, that is, the extension to which the extension telephone (Ex2) is connected, is used as the extension to be called. By sending a dial-in signal to the exchange (PBX), the call arrives at the extension telephone (Ex2) transmitted by the caller C.

If the above process is listed in an easily understood manner,
(1) An extension telephone (Ex2) connected to an extension that is not dial-in dials the number of the other telephone (TL). (2) The number detector (IDS) is an extension telephone (Ex
2) The extension number and the dial number, that is, the telephone number of the other party, are transmitted through a transfer circuit (TRF) to a call information recording transmitter (DC).
Transfer to I). (3) Dial-in private branch exchange (PB)
X) receives the dial number of the extension telephone (Ex1) and sends it to the call information recording and sending device (DCI). (4) The call information record transmitter (DCI) is a dial-in private branch exchange (PB).
X) and the extension number (Ex2) specified from the dial number obtained from the number detector (IDS), and the extension to which the extension telephone (Ex2) is connected is an extension that is not a dial-in from the information stored and held in advance. And records the extension number and the dial number, that is, the other party's telephone number in association with each other, and sends a specific dial-in extension number to the public telecommunications network (PSTN). (5) The transmitted dial-in extension number is displayed on the calling number display (DP) of the other party's telephone line. (6) Later, when the other party's telephone (TL) calls back to the number displayed on the calling number display (DP), (7) the call information recording transmitter (DC)
I) indicates from the record the extension number corresponding to the other party's telephone number obtained by the caller information notification service provided by the public telecommunication network (PSTN), that is, the extension number to which the extension telephone (Ex2) is connected. A dial-in signal is sent to a dial-in private branch exchange (PBX) as an extension to which a number should be received. (8) The dial-in private branch exchange (PBX) causes the extension telephone (Ex2) to dial back the call from the other party.

In the above operation, the call information recording and transmitting device (DC
The retention period of the record of I) can be set by a fixed time or the number of incoming calls from the other party's telephone (TL). Depending on the purpose of use, the extension number and the dial number may be recorded in advance in association with each other, and may be set to be permanently stored.

As an example of storing the extension number and the dial number permanently in a record, a combination of both the purchasing department of the company and the two parties who talk, such as the supplier and the subcontractor, is always specified. It can be applied in such cases. That is, in FIG. 1, there is a case where a call from the other party's telephone (TL) always wants to be received by the extension telephone (Ex2).

The present invention can naturally cope with a case where a plurality of dial-in private branch exchanges face each other across a public telecommunications network.

[0026]

Embodiment 3 FIG. 3 shows another embodiment of the extension telephone incoming call correcting device of the present invention, and its details will be described below. In this embodiment, a plurality of dial-in extensions (Ex1, Ex2... E) are provided to a dial-in private branch exchange (PBX).
xn) and a plurality of extension telephones (Ey1, Ey2,... Eyn) which are not dial-in extensions.
Identification information such as the extension number of an extension telephone (Ey1, Ey2,... Eyn) of a non-dial-in extension is transmitted to the call information recording and transmitting device (DCI) of the extension telephone (Ex1, Ex2. By registering any one as the same group, extension incoming call correction according to the first embodiment can be performed.

That is, (1) the identification information such as the extension number of the extension telephone (Ey1, Ey2,... Eyn) of the extension which is not a dial-in extension is transmitted to the extension telephone (E
x1, Ex2,... Exn) as the same group. (2) As an example of the procedure described above, for example, when the other party's telephone (TL) is called from an extension (Ey1) of a non-dial-in extension registered in a group of extension telephones (Ex1) of a dial-in extension, (3) a number detector (IDS) informs the transfer circuit (T) that the extension telephone (Ey1) has called the other telephone (TL).
(RF) to a call information record transmitter (DCI).
(4) The dial-in private branch exchange (PBX) receives the dial number of the extension telephone (Ey1) and sends it to the call information recording and sending device (DCI). (5) Call information record transmitter (DC
I) is based on the dial number obtained from the dial-in private branch exchange (PBX) and the number detector (IDS), and the extension telephone (Ey)
1) is specified, and in the case of a call from the extension telephone (Ey1) based on the information held and stored in advance, the extension telephone (Ey1) of the dial-in extension registered as the same group.
The dial-in extension number of x1) is transmitted to the public telecommunications network (PSTN) as a calling telephone number. (6) The extension telephone (Ex) is displayed on the calling number display (DP) of the other party's telephone line.
The dial-in extension number of 1) is displayed. (7) When a call is returned from the other party telephone (TL) based on the number displayed on the calling number display (DP), (8) the call information record transmitter (DCI) dials from the public telecommunication network (PSTN). The extension number, ie, the dial-in extension number of the extension telephone (Ex1), is entered into the dial-in private branch exchange (PBX).
Send to (9) Dial-in private branch exchange (PBX)
Is to make the extension telephone (Ex1) corresponding to this dial-in extension number receive a call back from the other party.

In the above, an extension telephone (Ex1) of a dial-in extension and an extension telephone (Ey1) of a non-dial-in extension are installed in the same department at a business office or the like, and the destination of a call back of the other party is targeted for each department. It can be used when it becomes.

[0029]

According to the extension telephone incoming call correcting apparatus of the present invention, when a plurality of extension telephones are connected to a public telecommunications network via a dial-in private branch exchange by a plurality of office lines, the extension telephones can be used. When a call is made, the telephone number of the selected office line, instead of the dial-in extension number, is displayed on the calling number display of the other party's phone, so confusion in erroneous calls that occurs when the other party's phone calls back to the caller Can be reliably eliminated. Therefore, the extension telephone incoming call correcting device of the present invention has industrial and practical value that is extremely large.

[Brief description of the drawings]

FIG. 1 is a diagram showing a circuit configuration of an extension telephone receiving apparatus according to the present invention.

FIG. 2 is a diagram illustrating a conventional dial-in private branch exchange having an extension telephone connected to a plurality of dial-in extensions, a counterpart telephone line having a calling number display, and a counterpart telephone connected to a public telecommunication network; 1 is a diagram illustrating a circuit configuration of a telecommunications system according to an embodiment.

FIG. 3 is another example of the extension telephone receiving apparatus according to the present invention in which a plurality of extension telephones of a dial-in extension and an extension telephone of a non-dial-in extension are connected to the dial-in private branch exchange; FIG. 2 is a diagram illustrating a circuit configuration.

[Explanation of symbols]

Ex1, Ex2... Exn: extension telephones Ey1, Ey2... Eyn: extension telephones connected to extensions that are not dial-in IDS: number detector PBX: private branch exchange DCI: call information record transmitter PSTN: public telecommunication network DP: Calling number display TL: Telephone of the other party TRF: Transfer circuit

Claims (3)

[Claims] 1. A plurality of extension telephones (Ex1, Ex2, Ex2,
... Exn) and dial-in private branch exchange (PBX)
, A public telecommunications network (PSTN), a calling number display (DP), and a remote telephone (TL), a dial-in private branch exchange (PBX) and extension telephones (Ex1, Ex2,...). Exn), a number detector (IDS) is provided, and a dial-in private branch exchange (P
BX) and a public telecommunications network (PSTN), and a call information record transmitter (DCI) is provided, and the number detector (IDS) is provided.
A transfer line (TR) between the
F) is provided and connected. The call information record transmitter (DCI) and the public telecommunications network (PSTN) are connected by an ISDN line. The number detector (IDS) is an extension telephone (Ex
1, Ex2,..., Exn), the dial number is detected and transferred to the call information recording and transmitting device (DCI) together with the extension number. The dial-in private branch exchange (PBX) receives the dial number of the extension telephone from which the call originated, and sends the dial number to the call information record transmitter (DCI). The call information recording and transmitting device (DCI) specifies the extension telephone which originated from the dial number of the number detector (IDS) obtained through the dial-in private branch exchange (PBX) and the transfer line (TRF), and the information which is self-maintained and recorded in advance. , When it is determined that the extension is a dial-in extension, the dial-in extension corresponding to the transferred extension is transmitted to the public telecommunications network (PSTN) as a calling telephone number. By the above,
When the dial-in extension is sent to the public telecommunications network (PSTN) as a calling telephone number, the public telecommunications network (PTN)
This is displayed on the calling number indicator (DP) of the other party's telephone line by the caller information notification service of STN). An extension telephone incoming call correcting device, characterized in that when the other party's telephone (TL) calls back to the displayed number, a correct dial-in call can be made to the extension telephone that made the call. 2. The configuration according to claim 1, wherein the number detector (IDS) is an extension telephone (Ex1, Ex2,... Ex).
n) Detects the dial number transmitted by any of the above and transfers it to the call information recording and transmitting device (DCI) together with the extension number. The dial-in private branch exchange (PBX) receives the dial number of the extension telephone from which the call originated, and sends the dial number to the call information record transmitter (DCI). Call Information Record Transmitter (DCI)
Is a dial-in private branch exchange (PBX) and a transfer line (TR
F) Identify the extension phone which originated from the dial number of the number detector (IDS) obtained through (D), and if it is determined that the extension is not dial-in from the information stored in advance and stored, make the extension number correspond to the dial number. In addition to recording, a specific dial-in extension is sent to the public telecommunications network (PSTN) as a calling telephone number. The other party's calling number display (DP) displays the specific dial-in extension transmitted above. Telephone (T
When L) calls back to this displayed number, the call information record transmitter (DCI) knows the other party's telephone number by the caller information notification service provided by the public telephone network (PSTN), and converts the record to the other party's telephone number. The extension telephone to which the corresponding extension number is connected is dialed in to a dial-in private branch exchange (PBX) as an extension telephone to be connected. As described above, the extension telephones (Ex1, Ex2,... E
2. The extension telephone incoming call correcting device according to claim 1, further comprising a pseudo dial-in function for receiving a call back to xn) as if it were connected to a dial-in extension. 3. The call information recording and transmitting device (DCI) according to claim 2, wherein one or a plurality of dial numbers, that is, the other party's telephone numbers are recorded for each extension number accommodated by the number detector (IDS). This recording includes fixed recording in advance and extension telephones (Ex1, Ex2,... Exn)
The telephone number of the other party may be additionally recorded each time a call is made from the telephone, and the additionally recorded other party number is valid for a certain set time or a certain set number of incoming calls. 2. The extension telephone incoming call correction device according to 2.